Tumbling barrel



July 3, 1923.

G. B. PICKOP TUMBLING BARREL July 3, 1923.

G. B. PICKOP TUMBLING BARREL 1920 2 Sheets-Sheet 2 Filed April 26 iii Patented July 3, 1923.

UNITED STATES PATENT OFFICE.

GEORGE BTPICKOP, OF NEW HAVEN, CONNECTIGI IT. ASSIGNOR TO THE MALLEALBLE IRON FITTINGS COMPANYi OF BRANFORD, CONNECTICUT, A CORPORATION OF CON- NECTICUT.

TUMBLING BARREL.

Application filed April 26, 1920. Serial No. 376,595.

To all whom it may concern:

Be it known that I, 'GEORGE B. PIcKor, a

- citizen of the United States, residing in the city and county of New Haven, State of Connecticut, have invented certain new and useful Improvements in TumblingBarrels, of which the following is a full, clear, and exact description.

This invention relates to foundry tumbling barrels and has special reference to those tumbling barrels used for the cleaning, scouring, smoothing or bright polishing castings after they have been taken from the mold. v

One of the primary objects of the inven tion is to provide a tumbling barrel with means to draw from the barrel during the tumbling operation dust, sand, minute particles of metal and other foreign material rubbed from the castings in the tumbling process.

A further objectof the invention is to provide an oblique tumbling barrel with an exhaust means such as described so that the barrel may be operated at any desired angle to the horizontal without interference with the supply of exhaust.

Another object of my invention is to provide the tumbling barrels with an exhaust means in such a manner that the openings through which the dirt and dust is drawn from the barrel will not be covered orobstructed by the work in the barrel, but at least a good portionof them will have free and unobstructed communication with the interior of the barrel.

To these and other ends the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawings:

Fig. 1 is aside elevational view of an oblique or tilting tumbling barrel with my improvements applied thereto.

Fig. 2 is a rear elevational. view of the same.

Figure 3 is a sectional view on line 3-3 of F i 1 looking in the direction of the arrows.

Fig. 4 is an enlarged sectional view of the barrel and exhaust ring taken on line 4=-4.

of Fig. 3.

Fig. 5 is a detail sectional view of another type of tumbling barrel showing a modified form of my invention.

'these particles of sand or packing or dirt of any kind and it is, naturally, of distinct advantage to have the castings emer e from this tumbling process, bright and c ean, in appearance, and smooth in contour. I have found that it is impossible to secure bright, clean castings by the tumbling process if dun ing the tumblingor rolling operation the dust, dirt, and sand removed from the castings .is allowed to remain in the barrel, only to be ground into the castings as the rolling continues. It is to -remove this dusty and dirt, at'once, upon its being loosened from the castings that I have made the invention herein described.

With reference to the accompanying drawings in which like reference characters refer to the same part or parts, the drum or container of the tumbling barrel is supported upon a base comprising standards 11 which usually rest upon the floor or any suitable support. On the upper ends of these standards is a journal bracket 12 provided with two journals 12 in each of which is mounted a trunnion 13. These trunnions are rigidly secured to or integral with a casting 14.- which On the plate member 18- is an eye 19- through which passes a chain 20 (see Figs. 1 and 2), the two ends of which are secured to a shaft 21 rotatably mounted on the standards 11 and adapted to be rotated by the wheel 22. A ratchet and pawl mechanism 23 holds the drum against descent under the force of gravity when tilted. It is apparent that the drum being thus mounted may be tilted on the trunnions 13 to the desired position by rotation of the shaft 21. Y

The left end of the shaft 16 as viewed in Figures 1 and 4 projects only a short distance without the journal bearing 15 and to this end of the shaft the drum or container 10 is rigidly secured by having the enlarged end 24 of the shaft clamped between the bottom' 25 of the drum l0 and a circular plate 26 bolted thereto. This plate is provided with gear teeth at 27 with which mesh the teeth of a pinion 28 keyed on a short shaft 29, which is mounted in a bearing 29' at the upper end of one of the standards 11. At the other end of this shaft 29 is a pulley 30 driven from a line shaft or suitable source ower (not shown) by the belt 31. The lby 30 then serves to rotate the barrel by means of the shaft 29, pinion 28 and gear 27. The shaft29 is in longitudinal alignment with the axis of the trunnions 13, so that the drum moves about the axis of this shaft, when tilted by the chains 20, and the driving engagement of the gears 27 and 28 is not interfered with. Within the container 10 is the usual work chamber 58.

The description thus far has related to common and known forms of tumbling barrels, no claim of invention being made thereto in this application, but I will now proceed to describe my improvements.

.In order to draw the dust and dirt from the drum during the tumbling operation, I have provided a channel shaped ring or annulus 32 which I mount to snugly surround the drum near the bottom end. The open side of the channel faces the drum which is provided between the two channel walls 33 and 34 with several rows of perforations 35 extending clear around the circumference of the drum. An exhaust cham her 32 is thus provided which communicates with the work chamber 58 through these perforations 35. These perforations extend through the wall and allow communi- I cation between the interior of the drum and the interior of the hollow ring or channel: member so that the dust, dirt, sand, jacking, etc., loosened in the tumbling process may be drawn from the drum. At the upper side of the channel shaped annulus a thimble 36 At the lower'side of the drum the annulus is provided with a chute 38, which is closed a trap closure member 39, pivoted or hlnged at 40 so that it may swing down to deposit the accumulated dirt when the weight of this dirt is suficient to overcome of exhaust.

the weight 42 which is secured at the end of an arm 41 rigid with the closure memher. In this way the dust, packing, etc., which is drawn from the drum through the perforations 35 and falls upon the closure 39, is automatically dumped and the opening is kept closed so as not to interfere with the draft of air through the drum.

The provision of the ring entirely surrounding the drum and thus aflording communication between the exhausting device and the drum at points around the entire circumference is an important one as in this way some part of the ring and the exhaust therein is always in communication with a free, open, space in the drum which is not filled up Or obstructed by the work-therein. If, for instance, .the exhaust communicatcd with the drum near the lower portion only or through a single port, whenever the castings covered this happen during the tum ling operation, the port would be closed or obstructed so that the particles of dust, packing, etc.,-would not have a free passage therethrough and would as a result remain in the drum to a large extent. The drum is provided with a perforated cover 45, the area of the openings, 46 in which'should approximate "the effective exhaust area of the openings 35.

This cover prevents escape of the dust raised by the a itation into the air.

This r1 ng 32 is supported and held against rotation by three brace members 43, each of which is bolted at one end to the ring and at the other end to the plate member 18. As the plate member is tilted with the drum, this construction interferes in no way with the tilting operation.

In the modification shown in Fig; 5, the container 10, within which is the work chamber 59 is a horizontal, cylindrical, drum mounted on hollow trunnions 50 (only one of which is shown, the construction at the other end of the'barrel being a duplication of that shown). supported in. standards 51. A cap or casing 52 fits over the end of this hollow trunnion and it is provided with a closure 53 similar to theclosure shown in Fig. 4, and a pipe 54 leading to a source In this embodiment the dust and dirt are drawn out through the hollow trunnion by means of the exhaust in the pipe 54 and fall on and are deposited by the closure 53. In order to prevent communication between the exhaust pipe and the interior of the drum from being obstructed by the castings or work therein, I provide a false end 55 of sheet metal or the like, perforated at 57 so that there, is comparatively free communication for the exhaust between the interior of the drum and the exhaust chamber 56 from which the'work is excluded by the false end.' The drum is never completely filled with castings so there is always a free ort, which would open space near the top of this false end from which the dust, can be drawn, where the perforations are unobstructed by the castings. As the castings might extend up to and above the trunnions 50, it is apparent that if this false end were not provided, the exhaust port in the trunnion would be obstructed. It is thus seen that in both of the modifications I have so arranged and constructed the parts so that the exhaust chamber always communicates with a free open space within the drum or work chamber which is not filled by the castings, and

the dirt, packing, etc., may be drawnthrough ports which are unobstructed by the castings.

It is also important to note that I have provided a tilting barrel with an exhaust means which onaccount of the tilting and rotating motions of which this type of barrel must be capable, has not heretofore been done.

.With my improved exhaust tumbling barrels the time required to clean castin s is reduced to about one-fifth of the time eretofore required and in fact, with the old barrels, the castings never could be taken from the barrel bright and clean and entirely free from dust and dirt as is the case when my improved barrel is used.

If desired, the other end of the barrel shown in Fig. 5may be provided with exhausting means similar to that of the end shown.

Various modifications and other embodiments of the invention may be adopted without departing from the scope of the invention as defined by the appended claims.

What I claim 1s:

1. In a tumbling barrel, a frame, a rotatably mounted drum supported thereon to tilt through a large angle, a source of exhaust, means affording communication between said drum and source of exhaust, and

means for rotating said drum in various tilted positions.

2. In a tumbling barrel, a frame, a drum' rotatably and tiltably supported thereon, means for tilting said drum through large angles to various operating positions, means for exhausting air from said drum, and means for rotating the drum, both of said 'means being operable in various tilted positions thereof.

3. In a tumbling barrel, a frame, a rotatable drum supported thereon to tilt through a large angle, and means including a flexible exhaust duct for exhausting air from said .drum in various tilted positions.

4. In a tumbling barrel, a main frame, an auxiliary frame tiltably mounted thereon to tilt throu h a large angle, a tumbling drum rotatab y mounted in said auxiliary frame, means providing an exhaust champoints around the circumference thereof,

said drum being mounted on the frame to tilt through a large angle, and means for connecting said ring to a source of exhaust in various tilted posltlons.

6. In a tumbling barrel, a frame, a rotatable drum mounted thereon to tilt through a large angle, means providing an exhaust chamber surrounding said drum and in communication with the interior thereof but held against rotation relative to said frame, means for rotating the drum within the chamber in various tilted positions, and means for connecting said chamber to a source of exhaust.

7. In a'tumbling barrel, a frame, a drum rotatably mounted thereon, a dust chamber adjacent said drum and communicating therewith to receive dust therefrom, means for discharging the dust from said chamber comprising an open chute, closing means for the opening provided with a Weight tending to urge said means to closing position, said closing means opening freely when the weight of the accumulated dust overcomes said wei ht.

8. A tilting o lique tumbling barrel comprising a drum a stem carried. thereby, a frame, means for tiltably mounting said stem on the frameto swing the drum to varlous tilting positions, an exhaust ring surrounding the drum and supported by sald mounting means, and means to connect the ring to a source of exhaust, and means to rotate the drum.

9. A tilting oblique tumbling barrel comprising a drum, a stem upon which the drum is carried, a support, means for tiltably mounting said stem on the support to swing the drum to various tilted positions, an exhaust chamber communicating with the interior of the drum in said various positions, means to connect said chamber to a source of exhaust, and means to r0- tate the drum.

10. A tilting oblique tumbling barrel comprising a drum, a stem upon which the drum is carried, a main frame, an auxiliary frame tiltably mounted 'on thesupport and having the stem mounted therein, an exhaust chamber carried by said auxiliary frame and in communication with the interior of the drum, means to connect the exhaust chamber to a source of exhaust, and means to rotate the drum.

11. An oblique tumbling barrel having a tiltable drum and adapted to be operated with the drum in'a tilted position whereby the work is urged by gravity toward one 5 end of theidrum, and means providing an "exhaust chamber in communication with that end of the drum toward which the work is urged.

' 12. An oblique tumbling barrel having a 10- tiltable drum and adapted to be operated with the drum in a tilted positionwhereby mower the Work is urged by gravity toward one end of the drum, means providing an exhaust chamber in communication with that end of the drum toward which the work is urged, and a cover for the other end of the drum provided with openings for the admission of air.

In witness whereof, I have hereunto set my hand on the 20th day of April, 1920.

GEORGE B. PIQOP. 

